comparison of the two forms is of great importance for the study of certain Constantinople churches.
The domed basilica, as the name indicates, is a basilica with nave and aisles. In which a square bay in the centre of the nave is covered by a dome on pendentives. To north and south, within the arches supporting the dome, appear the nave and gallery arcades of the basilica ; and as the galleried basilica is a usual Eastern form galleries are usual iti the domed basilica. As seen from the central area, therefore, the north and south dome arches are filled
FIG. i,—KASR IBN WARDAN (Strzygowski).
iii with arcades in two stories, and the side aisles and galleries are covered with barrel vaults running parallel to the axis of the church. At the west end a gallery over the narthex may unite the two side galleries. At Kasr ibn Wardan, instanced by Strzygowski as a typical domed basilica,1 there is such a western gallery (Fig. i). According to Strzygowski the domed basilica is older than the fifth century.
The domed basilica remains always an oblong building, and whilst the two sides to north and south are symmetrical, the western end retains the basilican characteristics—it has no gallery or arcade communicating with the central area. The narthex communicates with the nave by doors, and if a
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